n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 73 |
5 | 501 |
6 | 4051 |
7 | 37633 |
8 | 394353 |
9 | 4596553 |
10 | 58941091 |
11 | 844031541 |
12 | 12949163833 |
13 | 213873687613 |
14 | 3782022682803 |
15 | 71267635330921 |
16 | 1439160383457121 |
17 | 30612704101371153 |
18 | 686728250047551043 |
19 | 16198763975779425373 |
20 | 400727742254252310441 |
[1,1,3,13,73,501,4051,37633,394353,4596553, 58941091,844031541,12949163833,213873687613, 3782022682803,71267635330921,1439160383457121, 30612704101371153,686728250047551043, 16198763975779425373,400727742254252310441] |